Module: MetaRPC::Callable

Defined in:
lib/metarpc/callable.rb

Overview

Module used to describe callable JSON RPC methods

Defined Under Namespace

Modules: ClassMethods

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/metarpc/callable.rb', line 4

def self.included(klass)
  super
  klass.send(:extend, ClassMethods)
end

Instance Method Details

#json_rpc_error(code) ⇒ Object

Raises:



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# File 'lib/metarpc/callable.rb', line 9

def json_rpc_error(code)
  raise RPCError.new(code), "Failed to call JSON RPC method : #{code}"
end

#validate_array(args, contract) ⇒ Object 



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# File 'lib/metarpc/callable.rb', line 53

def validate_array(args, contract)
  contract.each_with_index do |contract_type, i|
    validate_item(args[i], contract_type)
  end
end

#validate_hash(args, contract) ⇒ Object 



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# File 'lib/metarpc/callable.rb', line 59

def validate_hash(args, contract)
  contract.each do |arg_name, contract_type|
    raise json_rpc_error(:invalid_params) unless args.key?(arg_name)

    validate_item(args[arg_name], contract_type)
  end
end

#validate_item(item, contract_type) ⇒ Object 



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# File 'lib/metarpc/callable.rb', line 13

def validate_item(item, contract_type)
  case contract_type
  when Hash
    validate_hash(item, contract_type)
  when Array
    validate_array(item, contract_type)
  when Class
    raise json_rpc_error(:invalid_params) unless item.is_a?(contract_type)
  when String
    klass, nullable, spread = if contract_type.end_with?('!')
                                [contract_type.delete('!').constantize, true, false]

                              elsif contract_type.end_with?('!...')
                                [contract_type.delete('!...').constantize, true, true]

                              elsif contract_type.end_with?('...')
                                [contract_type.delete('...').constantize, false, true]

                              else
                                [contract_type.constantize, false, false]
                              end

    if spread
      raise json_rpc_error(:invalid_params) unless item.is_a?(Array)

      item.each do |sub_item|
        next if sub_item.nil? && nullable
        raise json_rpc_error(:invalid_params) unless sub_item.present? && sub_item.is_a?(klass)
      end
    else
      return if item.nil? && nullable
      raise json_rpc_error(:invalid_params) unless item.present? && item.is_a?(klass)
    end
  else
    raise json_rpc_error(:internal_error)
  end
rescue NameError
  raise json_rpc_error(:internal_error)
end